Study of Synthesis Process of L-Ascorbic Acid Cellulose Ester

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In this article, L-ascorbic acid cellulose ester, a polymer with antioxidant properties, was synthesized using L-ascorbic acid and sodium carboxymethyl cellulose as feedstock. The whole reaction was divided into two parts: the preparation of carboxymethyl cellulose carbonyl chlorides and the synthesis of L-ascorbic acid cellulose ester. The optimal conditions of acyl chloride preparation: ratio (m/v) of CMCH to SOCl2 was 1:3, proportion (m/v) of CMCH to DMF was 1:20, reaction temperature was 110-120°C, reaction time was 2h. The optimal conditions of L-ascorbic acid cellulose ester synthesis: ratio (m/v) of L-ascorbic acid to solvent was 1:3.5, proportion (Mol/Mol) of Carboxymethyl cellulose carbonyl chlorides to L-ascorbic acid was 1:1.3, reaction temperature was 20°C, reaction time was 22h. In this reaction conditions, the synthetic product not only saved the antioxidant activity of the groups, and added the safe and non-toxic ability of dietary fiber.

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